This is the series finale after season 4 being cancelled due to Covid-19
Though the character was not yet introduced, at least not to a large audience, Carmen's portrayal of the Ghost of Christmas Future borrows from The Undertaker, especially the "sitting up" part.
Sheila uses the term "Hate Crime" which did not become widely used and recognized for over a decade.
When Bash is equating dying to being possibly gay, he's referring of course to AIDS (based on Florian). Ironically, Debbie says that Liberace has probably slept with more chauffeurs than she has, and that Liberace's doing fine... but he would die of AIDS not long after this timeline.
Ruth said her first time acting was playing Tiny Tim in A Christmas Carol; in a previous episode, because of her broken leg and crutches, she was nicknamed Tiny Tim by Annabella Sciorra's character Rosalie Biagi.